Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 34/12.5-18 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.03 (864.24) | 32.71 (830.8) | -1.32 (-33.44) -3.9% |
| Width inches (mm) | 12.52 (318) | 11.22 (285) | -1.3 (-33) -10.4% |
| Circum. inches (mm) | 106.89 (2715.09) | 102.76 (2610.04) | -4.14 (-105.05) -3.9% |
| Sidewall Height inches (mm) | 8.01 (203.52) | 7.85 (199.5) | -0.16 (-4.02) -2% |
| Revolutions per mile (km) | 592.74 (368.31) | 616.6 (383.14) | 23.86 (14.82) 4% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.23 mph (30.94 km/h) |
| 25 mph (40.23 km/h) | 24.03 mph (38.68 km/h) |
| 30 mph (48.28 km/h) | 28.84 mph (46.41 km/h) |
| 35 mph (56.33 km/h) | 33.65 mph (54.15 km/h) |
| 40 mph (64.37 km/h) | 38.45 mph (61.88 km/h) |
| 45 mph (72.42 km/h) | 43.26 mph (69.62 km/h) |
| 50 mph (80.47 km/h) | 48.07 mph (77.35 km/h) |
| 55 mph (88.51 km/h) | 52.87 mph (85.09 km/h) |
| 60 mph (96.56 km/h) | 57.68 mph (92.82 km/h) |
| 65 mph (104.61 km/h) | 62.48 mph (100.56 km/h) |
| 70 mph (112.65 km/h) | 67.29 mph (108.3 km/h) |
| 75 mph (120.7 km/h) | 72.1 mph (116.03 km/h) |
| 80 mph (128.75 km/h) | 76.9 mph (123.77 km/h) |
| 85 mph (136.79 km/h) | 81.71 mph (131.5 km/h) |
| 90 mph (144.84 km/h) | 86.52 mph (139.24 km/h) |
| 95 mph (152.89 km/h) | 91.32 mph (146.97 km/h) |
| 100 mph (160.93 km/h) | 96.13 mph (154.71 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1569 | 1823 | 1963 | 2050 | 2143 | 2210 | 2284 | 2370 | 2491 | 2611 | 2744 | 2851 | 3045 | 3258 | 3425 | 3532 | 3592 | 3813 | 4120 | 4788 |
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